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Changes in heavy metal bioavailability and speciation from a Pb-Zn mining soil amended with biochars from co-pyrolysis of rice straw and swine manure.
Sci Total Environ. 2018 Aug 15; 633:300-307.ST

Abstract

Biochar has been utilized as a good amendment to immobilize heavy metals in contaminated soils. However, the effectiveness of biochar in metal immobilization depends on biochar properties and metal species. In this study, the biochars produced from co-pyrolysis of rice straw with swine manure at 400°C were investigated to evaluate their effects on bioavailability and chemical speciation of four heavy metals (Cd, Cu, Pb and Zn) in a Pb-Zn contaminated soil through incubation experiment. Results showed that co-pyrolysis process significantly change the yield, ash content, pH, and electrical conductivity (EC) of the blended biochars compared with the single straw/manure biochar. The addition of these biochars significantly increased the soil pH, EC, and dissolved organic carbon (DOC) concentrations. The addition of biochars at a rate of 3% significantly reduced the CaCl2-extractable metal concentrations in the order of Pb>Cu>Zn>Cd. The exchangeable heavy metals decreased in all the biochar-amended soils whereas the carbonate-bound metal speciation increased. The increase in soil pH and the decrease in the CaCl2 extractable metals indicated that these amendments can directly transform the highly availability metal speciation to the stable speciation in soils. In conclusion, biochar derived from co-pyrolysis of rice straw with swine manure at a mass ratio of 3:1 could most effectively immobilize the heavy metals in the soil.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Meng J
Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China.
Tao M
Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China.
Wang L
Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China.
Liu X
Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China. Electronic address: xmliu@zju.edu.cn.
Xu J
Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China.

MeSH

CharcoalEnvironmental MonitoringEnvironmental Restoration and RemediationLeadManureMetals, HeavyMiningOryzaSoilSoil PollutantsZinc

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29574374

Citation

Meng, Jun, et al. "Changes in Heavy Metal Bioavailability and Speciation From a Pb-Zn Mining Soil Amended With Biochars From Co-pyrolysis of Rice Straw and Swine Manure." The Science of the Total Environment, vol. 633, 2018, pp. 300-307.
Meng J, Tao M, Wang L, et al. Changes in heavy metal bioavailability and speciation from a Pb-Zn mining soil amended with biochars from co-pyrolysis of rice straw and swine manure. Sci Total Environ. 2018;633:300-307.
Meng, J., Tao, M., Wang, L., Liu, X., & Xu, J. (2018). Changes in heavy metal bioavailability and speciation from a Pb-Zn mining soil amended with biochars from co-pyrolysis of rice straw and swine manure. The Science of the Total Environment, 633, 300-307. https://doi.org/10.1016/j.scitotenv.2018.03.199
Meng J, et al. Changes in Heavy Metal Bioavailability and Speciation From a Pb-Zn Mining Soil Amended With Biochars From Co-pyrolysis of Rice Straw and Swine Manure. Sci Total Environ. 2018 Aug 15;633:300-307. PubMed PMID: 29574374.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Changes in heavy metal bioavailability and speciation from a Pb-Zn mining soil amended with biochars from co-pyrolysis of rice straw and swine manure. AU - Meng,Jun, AU - Tao,Mengming, AU - Wang,Lili, AU - Liu,Xingmei, AU - Xu,Jianming, Y1 - 2018/03/22/ PY - 2018/01/08/received PY - 2018/03/13/revised PY - 2018/03/17/accepted PY - 2018/3/27/pubmed PY - 2018/7/20/medline PY - 2018/3/26/entrez KW - Bioavailability KW - Biochar KW - Heavy metal KW - Metal speciation KW - Remediation SP - 300 EP - 307 JF - The Science of the total environment JO - Sci Total Environ VL - 633 N2 - Biochar has been utilized as a good amendment to immobilize heavy metals in contaminated soils. However, the effectiveness of biochar in metal immobilization depends on biochar properties and metal species. In this study, the biochars produced from co-pyrolysis of rice straw with swine manure at 400°C were investigated to evaluate their effects on bioavailability and chemical speciation of four heavy metals (Cd, Cu, Pb and Zn) in a Pb-Zn contaminated soil through incubation experiment. Results showed that co-pyrolysis process significantly change the yield, ash content, pH, and electrical conductivity (EC) of the blended biochars compared with the single straw/manure biochar. The addition of these biochars significantly increased the soil pH, EC, and dissolved organic carbon (DOC) concentrations. The addition of biochars at a rate of 3% significantly reduced the CaCl2-extractable metal concentrations in the order of Pb>Cu>Zn>Cd. The exchangeable heavy metals decreased in all the biochar-amended soils whereas the carbonate-bound metal speciation increased. The increase in soil pH and the decrease in the CaCl2 extractable metals indicated that these amendments can directly transform the highly availability metal speciation to the stable speciation in soils. In conclusion, biochar derived from co-pyrolysis of rice straw with swine manure at a mass ratio of 3:1 could most effectively immobilize the heavy metals in the soil. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/29574374/Changes_in_heavy_metal_bioavailability_and_speciation_from_a_Pb_Zn_mining_soil_amended_with_biochars_from_co_pyrolysis_of_rice_straw_and_swine_manure_ DB - PRIME DP - Unbound Medicine ER -